CVE-2020-0836

Windows DNS Denial of Service Vulnerability

Description

A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries. An attacker who successfully exploited this vulnerability could cause the DNS service to become nonresponsive. To exploit the vulnerability, an authenticated attacker could send malicious DNS queries to a target, resulting in a denial of service. The update addresses the vulnerability by correcting how Windows DNS processes queries.

7.5

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 16.25% Top 10%

Vendor Advisory microsoft.com

Affected: Microsoft Windows Server version 2004

Affected: Microsoft Windows Server 2019

Affected: Microsoft Windows Server 2019 (Server Core installation)

Affected: Microsoft Windows Server, version 1909 (Server Core installation)

Affected: Microsoft Windows Server, version 1903 (Server Core installation)

Affected: Microsoft Windows Server 2016

Affected: Microsoft Windows Server 2016 (Server Core installation)

Affected: Microsoft Windows Server 2008 Service Pack 2

Affected: Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)

Affected: Microsoft Windows Server 2008 Service Pack 2

Affected: Microsoft Windows Server 2008 R2 Service Pack 1

Affected: Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)

Affected: Microsoft Windows Server 2012

Affected: Microsoft Windows Server 2012 (Server Core installation)

Affected: Microsoft Windows Server 2012 R2

Affected: Microsoft Windows Server 2012 R2 (Server Core installation)

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0836	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-0836?: CVE-2020-0836 has been scored as a high severity vulnerability.
How to fix CVE-2020-0836?: To fix CVE-2020-0836, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-0836 being actively exploited in the wild?: It is possible that CVE-2020-0836 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~16% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-0836?: CVE-2020-0836 affects Microsoft Windows Server version 2004, Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows Server, version 1909 (Server Core installation), Microsoft Windows Server, version 1903 (Server Core installation), Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation), Microsoft Windows Server 2008 Service Pack 2, Microsoft Windows Server 2008 Service Pack 2 (Server Core installation), Microsoft Windows Server 2008 Service Pack 2, Microsoft Windows Server 2008 R2 Service Pack 1, Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation), Microsoft Windows Server 2012, Microsoft Windows Server 2012 (Server Core installation), Microsoft Windows Server 2012 R2, Microsoft Windows Server 2012 R2 (Server Core installation).